French President Francois Hollande and his German counterpart Joachim Gauck paid emotional tributes Sunday to the millions of soldiers who died during World War I, exactly 100 years after Germany declared hostilities against France.

The two leaders gathered at Hartmannswillerkopf to remember the 30,000 soldiers who lost their lives in fierce battles around the rocky peak known as the "man-eater" in France's Alsace region near the border between the two countries.

Thousands of people took to the streets in several cities across France on Saturday to protest Israel's deadly offensive in the Gaza Strip.

"Israel murderer, Hollande partner in crime," shouted demonstrators at a rally in Paris, while others gathered in several cities throughout the country, including Marseille, Lyon and Lille, to voice their support for the Palestinians.

The bodies of two Belgian climbers who were swept away by falling rocks and ice on France's Mont Blanc mountain were found on Saturday after two days of searching, police rescue officials said.

Lebanon has handed over DNA samples from relatives of 20 citizens killed in a July 24 Air Algerie plane crash in Mali, a foreign ministry source told Agence France-Presse on Friday.

Mali is leading the investigation into the crash in which 118 people were killed when their plane went down in a remote area on the southern edge of the Sahara.

French authorities have ordered a probe after more than 50 kilos of seized cocaine worth millions of euros went missing from the Paris police headquarters.

France is considering disbanding a radical Jewish group whose members clashed with pro-Palestinian activists during rallies over Israel's offensive in Gaza, a source close to the case told Agence France Presse Thursday.

News of the mooted ban on the Jewish Defense League (LDJ) came just ahead of an evening pro-Israel demonstration outside the Jewish state's embassy, located near the French prime minister's office.

Identifying the victims from last week's Air Algerie crash in Mali "could take weeks, months and maybe years", Algeria's chief of police said on Thursday.

An Air Algerie McDonnell Douglas 83 flying from Burkina Faso to Algiers crashed in northern Mali last Thursday, killing all 118 people on board.

The French government is seeking to disband a radical Jewish group involved in recent clashes with pro-Palestinian activists during rallies against the Gaza offensive, a source told AFP Thursday.

News of the mooted ban came as France's main Jewish group prepared to stage a pro-Israel gathering in Paris, in response to weeks of protests marred by clashes, arrests and allegations of anti-Semitism.

Islamist groups have seized the army special forces headquarters in Libya's Benghazi after days of fighting left at least 35 soldiers dead and plunged the country deeper into lawlessness.

An Islamist and jihadist alliance announced the capture of the main military base in the eastern city in a statement early Wednesday, which was confirmed by an army official.

A Frenchman suspected of carrying out a fatal shooting at the Jewish Museum in Brussels was charged Wednesday with "murder in a terrorist context", the Belgian prosecutor's office said.

Mehdi Nemmouche, 29, who spent more than a year fighting with Islamist extremists in Syria, was extradited from France to Belgium the previous day to be questioned over the May 24 shooting which left four people dead.